Apparatus for preparing coffee and other infusions



c. URTIS APPARATUS FOR PREPARING (fol FEE AND OTHER INFUSIQNS March 13, 1928.

Filed Dec. 10.- 1925.

Patented Mar. 13, 1928. UNITED ZSTATES PATENT OFFICE.

cnsann onus, or rum, ITALY, Assronon r'o Giovanni ammonia, or rum,

- many.

APPARATUS FOR PREPARING, OOI'I'EE AND OTHER IHFUSIOIS.

Application filed December 10, 1928, Serial No. 153,900, and in Austria November $3, 1926.

This invention relates to an apparatus for preparing cofiee infusion where in hot water at a temperature between 90 and 100 C. is brought to act upon the ound coffee and pressure air is employed or the rapld filtration ofthe drink.

The process used in the apparatus ,known heretofore for the rapid preparation of coffee drink is known under the term express and consists in bringing upon the powdered coifee boiling water at a temperature above 100 C. and in rapidly establishing the pres- I sure for filtration by the action of steam,

- advantage 7 deriving for this purpose boiling water and steam from a suitable pressure boiler.

The coffee drink thus obtained has the of being rapidly prepared and flavoure but is considerably turbid owing I to the resinous and tannic stufis passed into the solution owing to the high temperature of the water and the action of the steam; it has moreover an astrin ent taste due to the presence of the said siibstances;

The apparatus accordin to my invent on completely obviates these disadvantages and gives arfectly clear'drink, ex uisite in taste an quicker in preparation Man with the ordinaryrmethods; consequently a hi higure 2 is a section on er efliciency of the plant and a considera leeconomy in workin as the production of pressure air is muc cheaper than that of steam, with the advantage of doing away with pressure boilers that are always dangerous and require skilled attendance and continuous care and su on. The elimination of steam-is finafiwgreat advant e to the rooms where coffee-is made especial y if. decorated withstuccos or the e.

' shows dia- I e accompan grammaticall and by way of example a constructiona form of my apparatus.

Figure 1 is a general view, showing theboiler in axial vertical section with the pipand cofiee generatinlghapparatus.

e 2 -2 of Fig. 1.

Figures 3, 4 and 5 are views showing details of the olice generating apparatus.

On the drawing, '1 denotes a vessel filled with'water heated by a central flame 2 acting in a conical Water'is fed to the vessel 1 through a pipe 5 opening into a constant level tank .sure which is transmitted .serving only a small. air. outlet chimney 3 through which boiler tubes 4 with insulating material for avoiding dis' persion of heat extends from the upper end the boiling vessel 1'; water automatically circulates through said tube and returns into the vessel 1 at the lower end thereof.

Above the vessel .1 and beside the tank 6 18 arranged a reservoir 8 wherein a'compressor unit 9 maintains a certain air pres through pipe 10. ()n pipe 7 are inserted the coffee generators 11 (substantially similar tothose employed in the machine known heretofore for the rapid preparation ofcoifee, from which,

however, they dili'er through the supply operating arrangement) hot ,water, first and pressure air, next, for filtration, are brought to act upon the ground coffee in said apparatus.

'lhe with a valve or distributor, the plug 12 whereof has two ports 13" and 15; port 13 with which it comes 'into alignment when port .15 communicates with tube 16 branched from the hotwater pipe 7, and remainin closed when port 15 comes into communication with the pressure air pipe 17 and in the closed position.

, In the' position shown in Fi tributor is closed by rotating t e lever'18'to the right, the ports come into the position shown in. Fig.: 3 and the hot water circulating through ipe 7 is allowed to enter the generator 11, driving away the air therein contained through port 13 and tube 14. r v

After filling in the hot. water the lever' 18 isrotated further to the ri ht and brings the-ports into the position 5, in which the tubes 14; and ,16 are closed and communication. is established between generators 11 are provided above own;.in Fig.

tube 14, 1

the pressure air. pipe 17 and the inside of reservoir, respectively of infusions comprising a vessel connected with the atmosphere and adapted to heat water to a temperature below 100 (1., a constant level tank communicating with said vessel, a source adapted to contain pressure air, a pipe connectin the upper and lower portion of the vessed, so as to obtain an automatic continuous circulation of the heated water, a'plurality of infusion generators branched from said ipe, a three-way cock on each of said branc 1 pipes, a pipe connecting the source of pressure air with each of SBJdMCOCkS so as to' connect said infusion generator first with the hot water pipe and successively with the pressure air source.

2. Apparatus for the rapid preparation of infusions comprising a vessel connected with the atmosphere and adapted to heat water to a temperature below 100 C, aeonstant level tank communicating with said vessel and arranged in a chamber above the vessel, a pressure air reservoir arranged in said chamber, a;pump for supplying pressure air to said reservoir, an infusion generator, pipes for connecting said generator with said hot water vessel and with said air and means in said conduits for supplying to said generator a given quantity of hot'water'and successively pressure air for filterin the drink. 3. Apparatus for the rapid preparation of infusions comprisinga vessel connected with the atmosphere and adapted to heat water to a temperature below 100 C., a constant level tank communicating with said vessel and arranged in a chamber above the vessel, a pressure air reservoir arranged in said chamber, a pump for supplying pressure air to said reservoir, a pipe connecting the upper and lower portions of the hot water vessel so as to obtain an automatic continuous circulation of heated water, a plurality of generators branched from said pipe, a three-way cock on each of said branch pipes, a pipe connecting said air reservoir with each of said cocks so as to connect said infusion generator first with the hot Water pipe and successively with the pressure air source.

4. Apparatus for the rapid preparation of infusions comprising a vessel connected with the atmosphere and adapted to heat water to a temperature below 100 (3., a constant level tank communicating with said vessel and arranged in a chamber above the vessel, a pressure 'air reservoir "arranged in said chamber, a pump for supplying pressure air to said reservoir, a pipe connecting the upper and lower portion of the hot water vessel so as to obtain an automatic continuous circulation of heated water,-a plurality of generators branched from said pipe, a three-way cock on each of said branch pipes, a pipe connecting said air reservoir with each of said cocks so as to connect said in- ,fusion generator first with the hot water pipe and successively' with the source of pressure air and means on said cocks for connecting said infusion generators with the outer'air before connecting them with the hot water pipe and the source of pressure air.

In testimony that I claim the foregoing as my invention, 1 have signed my name.

CESARE URTIS. 

